Diamond drill.



1 F. BADE.

DIAMOND DRILL. APPLICATION FILED KAY 19,1911.

Patented 051111912.

- Z '0 all wiiom it may concern:

sirATns PATENT OFFICE.

' Fnanz Bans, or name, GERMANY.

DIAMOND DRILL.

Specification of Letters Patent.

Application filed Kay 19, 1911. Serial No. 628,282.

Patented Oct. 15, 1912.

Be it known that I, FRANZ Bani a subect of the-German Emperor, residingat Peine, in Germany, have, invented certainnew and useful Improvementsin Diamond Drills, of, which the following isa specification.

In. working with diamond dri11 s', ditfic l ty frequently arises inconnection 'with'the-im sertion of the diamonds into. the drill head;eat skill, care and; accuracy, inorder to ad ust the diamonds in. properrelation to. each. other.- This is'more particularly the case with loose'diamondsi an operation requiring It has been proposed to fix'thediamonds to disks or the like adapted to be fitted to the drill head,but with themethod heretofore adopted for thispurpose, specialadjustment of the seat of each diskwas required, ac-

cording to the position of the diamond thereon.-

The object o f'the present invention is to enable accurate positioningof the diamonds to be secured by uniform insertion of the severalholders, without special adjustmentthereof upon the'ir seats. l Theinvention is illustrated in the accompanying drawing, in which:'

Figure 1 is an-axial section'of -the drill head,and Fig. 2 a plan viewthereof. Figs." 3, 4 and 5 are side-views-of diamond holders forinsertion-into the drill head, and

F s. 6, 7 and 8 are corresponding plan- .vi ws.

Referring to Figs 1 and 2, a is the annular drill head, which-carriestheholders "1) of the diamonds -(;;'the holders being in the 'form ofstuds, whereof the shanks fit into,

holes or sockets e e uidistant from the central axis of the dri 1 head.The diame of each shank is equal-to about half the thickness of thedrill-head; According to the present invention the studs are so treated,

1 for shaping pu oses, that in the caseof the same line, external,internal orcentral, the position of the cutting edge relatively to thestud axis is exactly uniform,and-s1milarly' several diamon s intended tocut onthe the vertical distance of'said' cuttingedge from-the under faceof the stud-head fso that when the said-studs are inserted'into "shape,as shown in Figs. 4 and 7 wherein "upon the shanks, asfinthe case of the"b" shown iiiFigs. 5.an d 8. g if g 4 WhatI'claim' as my invention anddesire States isz g 1. The combination with an annular drillf the-drillhead the diamonds are axially and radiallv accurately positionedforcutting, without requiring special adjustment.

The studs me be fixed by soldering or other means, an the drill head isprovided with lateral passages d enabling the studs to, be forced out of-the sockets again when they are to be exchanged.

I-preferto use studs of angular outline, as

shown in Figs. 2, 3 and 6, inasmueii as such studsfc'an be convenientlysecure against rotation by fitting them into-notches. may, however, alsouse studs of circular 66 the head of the stud b is concentric with theshank, or studs with .heads eccentric to secureby'lLetters Patent of thehead having-5a llfi'ality' of cylindrical sock-Q. ets; th-uXBS-Owhich-ate, equidistant fromi'lfi and parallel t -theaxis of the'drillhead,{f,. a pluralitv'of separate diamond, mounts each "OQmpl1Sil1:-Ecylindrical shank and'a head of larger iameter than the shank, anddiamonds mounted onithe upper face of said mount-heads respectively atdifferent pre determined distances with respect to the axis ofthel-moun't'shanks.

2. Ehe combinationwith an annular drill head having. a plurality of anlar recesses terminating in cylindrical soc ets, the,;axes

of which are equidistant from and parallel? nesses. FRANZ BABE.

i CARL SCIIWGER,

CARL Dzmtm I

